Large mesospheric ice particles at exceptionally high altitudes
We here report on the characteristics of exceptionally high Noctilucent clouds (NLC) that were detected with rocket photometers during the ECOMA/MASS campaign at Andøya, Norway 2007. The results from three separate flights are shown and discussed in connection to lidar measurements. Both the lidar m...
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2009
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ftleibnizopen:oai:oai.leibnizopen.de:ht-Pm4YBdbrxVwz60IEw 2023-05-15T13:25:41+02:00 Large mesospheric ice particles at exceptionally high altitudes Megner, L. Khaplanov, M. Baumgarten, G. Gumbel, J. Stegman, J. Strelnikov, B. Robertson, S. 2009 application/pdf https://doi.org/10.34657/1554 https://oa.tib.eu/renate/handle/123456789/4041 eng eng München : European Geopyhsical Union CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ CC-BY Annales Geophysicae, Volume 27, Issue 3, Page 943-951 Atmospheric composition and structure (aerosols and particles cloud physics and chemistry middle atmosphere composition and chemistry) altitude atmospheric chemistry atmospheric structure gravity wave ice lidar mesosphere nucleation particle size polar mesospheric cloud 530 article Text 2009 ftleibnizopen https://doi.org/10.34657/1554 2023-03-01T07:48:25Z We here report on the characteristics of exceptionally high Noctilucent clouds (NLC) that were detected with rocket photometers during the ECOMA/MASS campaign at Andøya, Norway 2007. The results from three separate flights are shown and discussed in connection to lidar measurements. Both the lidar measurements and the large difference between various rocket passages through the NLC show that the cloud layer was inhomogeneous on large scales. Two passages showed a particularly high, bright and vertically extended cloud, reaching to approximately 88 km. Long time series of lidar measurements show that NLC this high are very rare, only one NLC measurement out of thousand reaches above 87 km. The NLC is found to consist of three distinct layers. All three were bright enough to allow for particle size retrieval by phase function analysis, even though the lowest layer proved too horizontally inhomogeneous to obtain a trustworthy result. Large particles, corresponding to an effective radius of 50 nm, were observed both in the middle and top of the NLC. The present cloud does not comply with the conventional picture that NLC ice particles nucleate near the temperature minimum and grow to larger sizes as they sediment to lower altitudes. Strong up-welling, likely caused by gravity wave activity, is required to explain its characteristics. publishedVersion Article in Journal/Newspaper Andøya LeibnizOpen (The Leibniz Association) Norway Andøya ENVELOPE(13.982,13.982,68.185,68.185) |
institution |
Open Polar |
collection |
LeibnizOpen (The Leibniz Association) |
op_collection_id |
ftleibnizopen |
language |
English |
topic |
Atmospheric composition and structure (aerosols and particles cloud physics and chemistry middle atmosphere composition and chemistry) altitude atmospheric chemistry atmospheric structure gravity wave ice lidar mesosphere nucleation particle size polar mesospheric cloud 530 |
spellingShingle |
Atmospheric composition and structure (aerosols and particles cloud physics and chemistry middle atmosphere composition and chemistry) altitude atmospheric chemistry atmospheric structure gravity wave ice lidar mesosphere nucleation particle size polar mesospheric cloud 530 Megner, L. Khaplanov, M. Baumgarten, G. Gumbel, J. Stegman, J. Strelnikov, B. Robertson, S. Large mesospheric ice particles at exceptionally high altitudes |
topic_facet |
Atmospheric composition and structure (aerosols and particles cloud physics and chemistry middle atmosphere composition and chemistry) altitude atmospheric chemistry atmospheric structure gravity wave ice lidar mesosphere nucleation particle size polar mesospheric cloud 530 |
description |
We here report on the characteristics of exceptionally high Noctilucent clouds (NLC) that were detected with rocket photometers during the ECOMA/MASS campaign at Andøya, Norway 2007. The results from three separate flights are shown and discussed in connection to lidar measurements. Both the lidar measurements and the large difference between various rocket passages through the NLC show that the cloud layer was inhomogeneous on large scales. Two passages showed a particularly high, bright and vertically extended cloud, reaching to approximately 88 km. Long time series of lidar measurements show that NLC this high are very rare, only one NLC measurement out of thousand reaches above 87 km. The NLC is found to consist of three distinct layers. All three were bright enough to allow for particle size retrieval by phase function analysis, even though the lowest layer proved too horizontally inhomogeneous to obtain a trustworthy result. Large particles, corresponding to an effective radius of 50 nm, were observed both in the middle and top of the NLC. The present cloud does not comply with the conventional picture that NLC ice particles nucleate near the temperature minimum and grow to larger sizes as they sediment to lower altitudes. Strong up-welling, likely caused by gravity wave activity, is required to explain its characteristics. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Megner, L. Khaplanov, M. Baumgarten, G. Gumbel, J. Stegman, J. Strelnikov, B. Robertson, S. |
author_facet |
Megner, L. Khaplanov, M. Baumgarten, G. Gumbel, J. Stegman, J. Strelnikov, B. Robertson, S. |
author_sort |
Megner, L. |
title |
Large mesospheric ice particles at exceptionally high altitudes |
title_short |
Large mesospheric ice particles at exceptionally high altitudes |
title_full |
Large mesospheric ice particles at exceptionally high altitudes |
title_fullStr |
Large mesospheric ice particles at exceptionally high altitudes |
title_full_unstemmed |
Large mesospheric ice particles at exceptionally high altitudes |
title_sort |
large mesospheric ice particles at exceptionally high altitudes |
publisher |
München : European Geopyhsical Union |
publishDate |
2009 |
url |
https://doi.org/10.34657/1554 https://oa.tib.eu/renate/handle/123456789/4041 |
long_lat |
ENVELOPE(13.982,13.982,68.185,68.185) |
geographic |
Norway Andøya |
geographic_facet |
Norway Andøya |
genre |
Andøya |
genre_facet |
Andøya |
op_source |
Annales Geophysicae, Volume 27, Issue 3, Page 943-951 |
op_rights |
CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.34657/1554 |
_version_ |
1766387236103782400 |